From the course: VFX Keying: Master Course
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How to key a cloud out of the sky - Nuke Tutorial
From the course: VFX Keying: Master Course
How to key a cloud out of the sky
- [Steve] Keying a cloud out of the sky is a delicate operation. Not only are there lots of wispy edges and details to be retained, but it's also sitting on a very uneven backing, namely the sky. So we've got to even up the sky region in order to get a fine key, so screen correction to the rescue, along with a few other tricks. So let's start by looking at our clean plate. I'm gonna use a little bit of a different procedure. Instead of using the IBK color node, it's a little too crude for this, so we're gonna use a Keylight node instead. So let me open that guy up, and I'm gonna reset that, and dial it in for you. So first of all using Shift, Alt, Command or Control will sample our backing region, check the alpha channel out. Now I need to clear all of this out to black. Viewer gamma up, Screen Gain up, and tragically as I clear out all the backing noise, I'm also shrinking my wispies. Very unfortunate, but that's the physics of the thing. So I had to do a Screen Gain of 1.38 to clear…
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How to add more hair detail11m 15s
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The special case of keying blond hair7m 14s
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Keying for more semitransparency5m 30s
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Techniques for better motion blur7m 23s
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How to retain all of the depth of field7m 2s
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Special keying techniques for smoke11m 3s
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Extra special keying techniques for fire8m 41s
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How to key a cloud out of the sky14m 53s
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Keying reflections off of glass techniques7m 10s
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How to cope with bad video12m 3s
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